Ascii to hex c program

Are you perhaps looking to convert the stream of received characters into an internal binary representation for further calculations? This is a far more common request. The library function atio does this job--after terminating the incoming stream of ASCII characters with a null.

That works on decimal representation. An example of this: You receive "". You terminate the string with a null, and pass it to atoi. It returns a bit signed integer. The value of the integer would be 0x, and can be used in further calculations.

Re-reading your latest post, are you just asking how to store the incoming data stream into a character string array? Active Oldest Votes. Here's a simplistic function to convert one character to a hexadecimal string. Community Bot 1 1 1 silver badge. Eddie Sullivan Eddie Sullivan 5 5 silver badges 8 8 bronze badges.

Note that the C standard doesn't guarantee that the values of the letters are contiguous. It does make that guarantee for digits. Goz Goz The Overflow Blog. Podcast Making Agile work for data science. Stack Gives Back C program to find if two numbers are Amicable or not. C program to check if a string is palindrome or not. C program to find the surface area of a cube. C program to check if a number is magic number or not. C program to find the factorial of a number using recursion.

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C program to find the power of a number using loop. C program to calculate the total number of lines in a file. If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut. If at first you don't succeed, try writing your phone number on the exam paper. Sorry, long post, I only skimmed after a bit. Reason: D'oh! Pokey again. It is easier to write an incorrect program than understand a correct one. There are two ways to write error-free programs; only the third one works.

I can't argue that this is simpler than what's already been suggested, but it's probably faster with larger strings: Code:. Thanks all - this has helped tremendously - ie.